San Joaquin River - San Joaquin Harbor Weather Forecast

    • 57
    • 69

    Rain

    • 52
    • 61

    Rain Showers

    • 49
    • 63

    Chance Rain

    • 52
    • 70

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 54
    • 69

    Partly Sunny

    • 53
    • 68

    Partly Sunny

Today 20 Apr East Bay Interior Valleys

Showers and a slight chance of Thunderstorms. Highs near 70. Southwest Winds 10 to 20 Mph.

Tonight 20 Apr East Bay Interior Valleys

Showers and a slight chance of Thunderstorms in the Evening, then rain after midnight. Lows in the lower to mid 50s. Southwest Winds 10 to 20 Mph decreasing to around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin River - San Joaquin Harbor Temperature Statistics

April Temperature

Concord, Buchanan Field (15.5 miles)

  • Lowest 3 April, 2026

    40.6 °F

  • Average April

    60.9 °F

  • Highest 5 April, 2026

    84.7 °F

Climate (2021–Present)

Concord, Buchanan Field (15.5 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    61.5 °F

  • Average High 2021–2026

    74.4 °F
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